Machine for forming twisted joints with wire.



PATENTED JAN. 6, 1903.

G. M. DEPEW. MACHINE FOR FORMING TWISTED JOINTS WITH WIRE.

APPLIOATION FILED MAY 28, 1901. RENEWED JUNE 12, 1902.

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PATENTED JAN. 6, 1903.

G. M. DEPEW. MACHINE FOR FORMING TWISTED JDINTS WITH WIRE.

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m: I Q 9 APPLICATION FILED MAY 28, 1901 RENEWED 12, 1902.

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" NITED STATES PATENT OFFICE.

GEORGE M. DEPEW, OF OANANDAIGUA, NEW YORK, ASSIGNOR TO GEORGE V.WILLSON, OF PITTSBURG, PENNSYLVANIA.

MACHINE FOR FORMING TWISTED J OlNTS WITH WIRE.

SPECIFICATION forming part of Letters Patent No. 717,551, dated January6, 1903. Application filed May 28, 1901. Renewed June 12, 1902. SerialNo. 111327, (No model.)

To all whom it may concern:

Be it known that I, GEORGE M. DEPEW, a citizen of the United States ofAmerica, residing in the city of Oanandaigu a, in the county of Ontario,in the State of New York, have invented certain new and usefulImprovements in Machines for Forming Twisted Joints with Wire, of whichthe following is a true and exact description, reference being had to tothe accompanying drawings, which form a part thereof.

My invention relates to machinery for twisting the ends of wirestogether, and is especially adapted for twisting the two ends of thewire together in the formation of a wire hoop.

The object of my invention is to provide simple and efficient mechanismfor the purposes above mentioned, and the nature of my improvements willbe best understood as described in connection with the drawings in whichthey are illustrated, and in which Figure l is a plan View of my machinein what I believe to be its best form; Fig. 2, a

sectional elevation on the line 2 2 of Fig. 1; Fig. 3, a sectionalelevation on the line 3 3 of Fig. 1; Fig. 4., a cross-sectionalelevation on the line 4 4 of Fig. 2. Fig. 5 is aview showing the way in.which the wire ends are placed when inserted in the machine to betwisted together. Fig. 6 is an exaggerated view illustrating the natureof the twist or curvature which is preferably imparted to the wirebefore it is put in the joint-forming machine.

Fig. 7 represents the completed joint. Fig. 8 represents a wire hoophaving its ends joined by twisting, and Fig. 9 is a view illustratingthe mode of operation of the twisting mechanism and also some details ofconstruction. a

to move into and out of engagement with the clutch member 19 guided onthe shaft B.

72 indicates a stop-pin projecting from the face of the gear-wheel B andso arranged as to engage on the edge of the frame A when the gear-wheelB is uncoupled with the shaft and to clear said edge when it is coupled.

B indicates a bell crank lever for moving the wheel B and its clutchmember, said lever q being actuated through a link B by a treadle B,which is normally held to its upper position,

that in which the gear-wheel is disengaged with the clutch by theactionof a spring B C C are short shafts supported in the bearings A andhaving secured to them gearwheels 0 0, both engaged with the gearwheel Bas shown'in Fig. 4. The ends of said shafts C have also secured to themthe universal joints (indicated at C coupling the shaft G to the shaftC3, the outer ends of which last-mentioned shafts have their bearings inprojections D of the swinging arms D and have attached to themmiter-wheels 0 D D are swinging arms pivoted to the frame D D and havingtheir outer free ends resting on the ridge A They have also attached totheir inner ends toothed segments D D which are in engagement with eachother and which cause all movements of the swinging 8o arms D on theirpivots to be synchronous and in opposite directions, so that they arealways equidistant from the center line. From the outer ends of theswinging arms D project the bearings D already mentioned, and alsostud-bearin gs D having the cylindrical openings D for the studs slottedat top, as indicated at D.

1) indicates a spring acting to draw the arms D D together into theposition shown in 0 Fig. 1.

E E are miter-wheels in engagement with the miter-wheels G C andattached to studbearings E E, turning in the slotted cylindrical bars Dof the bearings D and formed with transverse slots extending past theircenters, as indicated at E The inner faces of the slots are preferablydrawn together and somewhat pointed, as indicated at e in Fig. 9, so asto engage in the spiral convolumo tions of the wire, as shown in saidfigure. The stud-bearings and wheels E are held in position on thebearings D by collars, as indicated at E E F indicates a bracket boltedon the center of the frame A between the swinging arms D D, having anupward extension forming a fixed jaw F of a gripping device andsupporting a pivot F, on which is pivoted the moving jaw F of thegripping device, having a lever extension F which is connected by a linkF with the treadle F normally held in its upper position by a spring Ftending to keep the gripping-jaws apart, as shown in Fig. 2.

G, Figs. 5 to 9, inclusive, indicatesaspiral Wire hoop which, as shownin all of said fig- .ures except Fig. 6, is formed as though by windingthe wire around a central line.

G G indicate the ends of the hoop, and G indicates the joint formed bytwisting the joints together.

In operation the ends of the hoop are lapped and brought together, asshown in Fig. 5. The lapped portion is then inserted between the jaws Fand F and into the slots in the studs E. The treadle F is depressed,causing the gripping-jaws to seize and hold the wires at the center, andthe treadle I3 is then depressed, coupling the spur-wheel B with thedriving-shaft B and causing the engaged gear-wheels C C to rotate in thesame direction, this movement being imparted through the universaljoints 0 to the shafts C O and their miter-wheels C and imparted to themiter-wheels E E and the grooved studs E E as rotative movement inopposite directions, as indicated in Fig. 9. The effect of this is thateach rotating slotted stud twists and winds the free end of the wirearound the body of the hoop, and as the grooves in the studs arepractically in engagement with the twist of the wire the studs and thearms D D supporting them move gradually outward from the center line,following the twisting of the wire until the joint is completed, asshown in Fig. 7. The operator then permits the treadle B to rise,uncoupling the shaft B from the gear-wheel 13 the stop 6 of whicharrests it and the parts coupled with it, including the slotted studs,as soon as they have reached the positions indicated in Figs. 1 and 2.At the same time the operator releases pressure on the treadle F,permitting the jaws F and F to move apart, so that the completed jointcan be removed from the machine and a new wire placed therein.

Many features of my invention are, I believe, in themselves new, and Ido not desire to be understood as limiting myself to the constructionshown except where such limitation is clearly expressed in the claims.

Having now described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In a machine for twisting the ends of wires together, the combinationof two bearing-blocks, movable to and from each other,

' with rotatable slotted studs, supported on and movable therewith, andmeans for rotating the studs in opposite directions.

2. In a machine for twisting the ends of wires together, the combinationof two bearing-blocks, movable to and from each other, withconstantly-acting means tending to hold the blocks together withyielding pressure, rotatable slotted studs supported on and movabletherewith, and means for rotating the studs in opposite directions.

3. In a machine for twisting the ends of wires together, the combinationof two bearing-blocks, movable to and from each other, with meansregulating such movement so that said blocks are always relativelyequidistant from a central point, rotatable slotted studs supported onand movable therewith, and means for rotating the studs in oppositedirections.

4. In a machine for twisting the ends of wires together, the combinationof two bearing-blocks, movable to and from each other, with meansregulating such movement so that said blocks are always relativelyequidistant from a central point, constantly-acting means tending tohold the blocks together with yielding pressure, rotatable slotted studssupported on and movable therewith, and means for rotating the studs inopposite directions.

5. In a machine for twisting the ends of wires together, the combinationof two bearing-blocks, movable to and from each other, with a stationarywire-gripping device situated between said movable blocks, rotatableslotted studs supported on and movable therewith, and means for rotatingthe studs in opposite directions.

6. In a machine for twisting the ends of Wires together, the combinationof the two arms, pivoted to the frame at one end and supportingbearing-blocks at their free ends, with slotted studs journaled in theblocks, means for synchronizing the movements of the arms, and means forrotating the slotted studs in opposite directions.

7. In a machine for twisting the ends of wires together, the combinationof the two arms, pivoted to the frame at one end and supportingbearing-blocks at their free ends, with slotted studs journaled in theblocks, means for synchronizing the movements of the arms, a stationarywire-gripping device secured centrally between the free ends of thearms, and means for rotating the slotted studs in opposite directions.

8. In a machine for twisting the ends of wires together, the combinationof two movable bearing-blocks, slotted studs journaled in said blocks, aconstantly-driven shaft, means for rotating said studs in oppositedirections, and a clutch for coupling and uncoupling said means with theconstantlydriven shaft.

9. In a machine for twisting the ends of wires together, the combinationof two movable bearing-blocks, slotted studs journaled IIO in saidblocks, a constantly driven shaft, Wires together, the two rotatableslotted studs means'for rotating said studs in opposite di- E E havingthe inner edges 6 of their slots 10 reetions, a clutch for coupling anduneonpnerrowerthan the body of the slots.

ling said means with the constantly-driven shaft, and a. stop forarresting the studs in GEORGE DEPEW determined positions when the clutchis dis- I Witnesses: engaged. I A. J. KELLY, J12, 10. In a machine fortwisting the ends of W. W. HEWITT.

